I have to disagree upon the sexy ninja thing. In reality, 99% of ninjas were scrawny, spindly men. The other 1% who were women, were prostitutes who would cut a dude's throat while snoggin' him. I don't know about you, but that doesn't really turn me on much.
Re: the images given. One is a pirate chick with an awesome gun who plundered ships, fought the King's navy. Loved and hated by all. The ninja pics are both animu, which for me at least, is a one-way ticket to ride on the "Disinterest Express". The pirate pic looks like a comic book or 90s cartoon show, which both equal WIN.
A little critique on those pics. Why does the first ninja look totally baffled? Is she getting to see a Klein Bottle form before her very eyes? Okay, I'll admit I love her hips, but she looks like she just saw a Michael Bay movie and she's trying to figure out whether or not she should go through with seppuku which is Japanese for "o no eye did nut purform 5000% uv mai lifes work i shud kill mahself" thing. Japemo.
Just my tuppence.